Improvement in sewing-machine stitches



c. F. BOSWORTH. Sewing Machine Stitch.

Patent ed June 9. 1863.

mines ses Wsw In venZQr:

N PETERS. Phom-Lilhog stitch was invented in order to sew braid to- UNITED STATES PATEN OFFICE.

(J. F. IBOSVVOR'IITI', OF NEW HAVEN, CONNECTICUT.

IMPROVEMENT lN SEWING-MACHINE ST-ITC'HES.

Specification forming part of Letters Patent No. 38,806, dated June 9, 1863.

ful seam or concatenation of threads or succession of stitches uniting together two pieces'of material, chiefly useful in the attachment of braids of straw, hair, and vegetable fiber either to each other or to other material; and I do hereby declare that the following, in connection with the drawings, is a full, clear, and exact description thereo g In the drawings. Fignrel isa section through a seam, and Figs. 2, 3, and 4 are views of modifications thereof.

This stitch may be made in any ordinary sewing machine by attaching thereto proper appliances, substantially such as are described in an application for a patent made by me and now pending in the Patent Office. It may also be made by hand; but the process would be so slow that the cost would be too great for any practicalpurpose. This stitch is to be made by an eye pointed needle, in connection with someotherinstrument,tosecureloops ofthread governed by that needle, these loops being secured either by anotherthread or by loops of the same thread, the manner of securing the loops being immaterial. I prefer, however, to secure them by another thread passed through them, as shown in 4 the drawings. In making this stitch one piece of the braid is to be turned around a bar or roller, as shown in Fig. 1, or it may be held in any convenient way in a bent position. The needle is then to be entered, as shown in the same figure, and passes into the braid and out of it again on the same side, and then through the piece to which the first piece is to be attached the thread passes with the needle, and its loop is to be secured by passing another thread or a loop of thread through When the needle is retracted the thread is drawn tight, drawing one piece of the braid down upon the other. A bend in a new spot is then to be made in the upper braid and another stitch taken. The needle may pass into the braid from one side or surface thereof and out again on the same side without perforating the other surface, as shown at 10, Fig. 2, or it may in its passage perforate the other surface, so that when it is withdrawn thread shall appearthereon, as at 10, Fig. 3 and the gether without any thread or with very little thread appearing on one surface of one of the braids, each braid being united to the otheriby adouble thread at the point where the needle perforates both the braids.

In sewing braids togetherit is notnecessary that they should be attached to each other at frequent intervals; but it is necessary, or at any rate expedient, in order toavoid' fraying of the stitch on the side that the under thread appears upon, that the under thread should be caught and held at frequent intervals. I theretore intend at times to pass the needle through the lower braid only, as seen at g ,'in Figs.3

and 4, and to make one or more interlockings of thread, as there shown, in the lower piece of braid orother goods only. Theseinterlockings serve to confine the lower thread, or the thread that appears below the lowest braid, and such interlockings are to alternate between interlockings uniting both braids, and shown at u u in the various figures.

The stitch is best and most conveniently made in an ordinary shuttle sewing-machine, in which the shuttle carries a thread through and secures loops of needle-thread, and the machine requires to have adapted to it a contrivance around which one braid can be bent,

a roller like 0 serving the purpose; and it should also have a proper guide or support for the needle applied just above the roller, so that the needle may be forced to preserve the required direction in passing through the upper braid.

In case it is desired to make the stitch with intermediate interlockings, as My 313 the ne'edle-guide should havea vibrating motion, which shall cause the needle at times to pierce, as shown in Figs. 1 and 2, going into one surface and outagain through the same surface of the upper-braid, and shall cause the needle at other times in its descent to miss the upper braid and pierce the lower braid only, The vibratory motion thus described can be communicated by any proper machinery.

The distinguishing peculiarity of the stitch is thata double thread or bight of thread passes into one surface of a braid, then out again through that same surface, and then through another braid, and is then secured either by another thread, as in a shuttle-stitch, by a loop of another thread, as in the Grover & Baker stitch, or by a loop of its ownthread, as in a crochet stitch, and this peculiarity is'to be distinguishing characteristic above set forth, found both when the thread appears on the formed in and uniting two pieces of braid or upper surface of the upper braid, as at 10, Fig. other material, said seam being chiefly useful 3,and when itdoes not appear on that surface, in uniting braids for bats and like fabrics. as represented at m, Fig. 2. The seam invent- In testimony whereof I have hereunto subed by memay have in it stitches of other kinds i scribed my name on this 8th day of August, interposed between those having the distin- A. D. 1861. guishing peculiarities or characteristics above defined, such other stitches being'like 0r different. from those shown at y y.

What I claim as of my invention is- A seam or succession of stitches having the o. F. BOSWORTH.

In prese'nce-of- HORACE H. CHIT'IENDEN, J. H. STARKWEATHER. 

